Ok, if you are seriously going to a) get into Twitch and b) ask us for help: you REALLY need to KNOW... not just guess. You don't need to be a "technical person" to know what Internet speed you have.
You think you have 6MB? You need to know. And is that 6MB UP & DOWN? Or just down? If it's just DOWN, what is your UP? UP is the more important number for a Streamer. If it is 6, yea that's probably a little slow unless you are the only one using that connection. Then it might be ok.